Changed algorithm for expire warning time of Request

Ignore-this: 765c36c6eafc29beb3d89943bf5a3382

darcs-hash:20090827074403-1e3d8-1a3440732fdd71f483f9c6470658657e886096ee
Added support in Logger for handling configuration changes

Ignore-this: 59ee4d4d4ecd9b7af71f576a2f7ae750

darcs-hash:20090827074436-1e3d8-cf820f090607c510f0d5adbc3acb10ad636bdc3c